<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<!--3.外部样式-->
		<link rel="stylesheet" type="text/css" href="css/my.css"/>
		
		<!--2.内部样式-->
		<style type="text/css">
			.color-blue{
				color: blueviolet;
				font-size: 40px;
			}
		</style>
	</head>
	<body>
		<!--1内嵌样式-->
		<h1 style="color:red">王老师</h1>
		<h1 class="color-blue">朱老师</h1>
		<h1 class="color-yellow">鞠老师</h1>
	</body>
</html>
